Dart Marking Machine
As far as I know most of the Dart Marking Machines (which look like a letter press) have bubbled up into European collections. That's even though they were made in Hartford, Connecticut, US. I think it's more of these typewriters found their way into collections here stateside. Some Dart Marking Machines are marked as being produced by Jno. (John) M. Fairfield who was, in fact, contracted to refine and produce the earliest examples. Later models are marked as being produced by The Dart Marking Machine Company.
Have one for sale? Please email me at Antikey.Chop@gmail.com